NaviSys Technology - Your Location Partner
SS4 GPS Smart Antenna Module / GM-420
GM-420, SiRFstarIV, Compact,
Easy to Use, Ultra-High Performance
GPS Smart Antenna Module
Flies up to 80km for high air version.
Overview
 Fully EMI shielded
GM-420 is built-in with patch antenna, backup battery,
 Removes in-band jammers up to 80 dB-Hz
power control pin, and digital connector. The
Industrial operating temperature range: -40 ~ 85
integrated design allows easily connect and use. The
built-in SiRFstarIV chip and our experienced design
Technical Specifications
provide fast acquisitions and excellent tracking
Receiver Performance Data
performance. This self-contained ultra-high performance,
Receiver Type
48-channel,
low power GPS smart antenna module makes it an ideal
L1 frequency, C/A code
solution for devices demanding both high performance
Horizontal Position
< 2.5m (Autonomous)
and small dimension.
Accuracy
< 2.0m (WAAS)
Applications
(50% 24hr static, -130dBm)
 Handheld navigation devices
Velocity Accuracy
<0.1 m/s (speed)
 Child/elderly/personal tracker and security system
<0.01° (heading)
 Driving recorder, digital camera
(50%@30m/s)
 Automatic vehicle location
Time To First Fix
Autonomous
 GPS clock
Hot start
<1sec
 High air balloon
Warm start
<35sec
Cold start
<35sec
Features
(50% -130dBm)
 Ultra-small (20x20 mm) and easy to use with built-in
Sensitivity
-147dBm (acquisition)
patch antenna, backup battery, and connector
(Autonomous)
-163dBm (tracking)
 Excellent EMI protection and minimum RF efforts
Update Rate
Default 1Hz, Max. 5Hz
 Based on SiRF’s GSD4e low power single chip
Max. Altitude
<18,000 m (normal version)
 High performance: -163dBm tracking sensitivity
80 km (high air version)
 Low power: 32mA, tracking (3.3V, 8 SVs, -130dBm)
Max. Velocity
<1,852 km/hr or 1,000 knots
 SBAS (WAAS, EGNOS, MSAS, GAGAN)
Datum
WGS-84 (default)
 GPS, QZSS support
Protocol Support
NMEA v3.00, OSP
 Multi-mode AGPS support (optional)
4800bps N,8,1;
 Local ephemeris prediction
NaviSys Technology Corp.
http://www.navisys.com.tw/
Tel : +886-3-5632598
Fax: +886-3-5632597
Sales contact: sales@navisys.com.tw
Technical support: service@navisys.com.tw
Address: 2F, No.56, Park Ave. II, Science-Based Industrial Park, Hsinchu 300, Taiwan (R.O.C.)
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NaviSys Technology - Your Location Partner
SS4 GPS Smart Antenna Module / GM-420
GGA, GSA, GSV, RMC
SBAS Support
WAAS, EGNOS, MSAS,GAGAN
6-pin Interface
GPS, QZSS,
Pin
Name
Function
I/O
Dynamics
<4g
1
GND
Ground
Input
2
VCC
Power supply
Input
3
TXD-TTL
TTL level serial data output
Output
Electrical Data
4
RXD-TTL
TTL level serial data input
Input
5
PPS
Pulse Per Second signal
Output
Power Supply;VCC
3.0~3.3V w/ built-in battery
6
PWR_CTRL
Power control
Input
high/floating: ON, low: OFF
3.0~5.5V w/o built-in battery
(VBAT, option)
External backup power
(Input)
Power Consumption
32mA/average tracking
Application
Backup Power; VBAT
Nominal voltage: 2.5~5.5 V
TTL I/O
VIH: 1.4~3.6V, VIL: 0~0.45V
1. Place GM-420 in device with antenna side facing
VOH: ≧1.5V, VOL: ≦ 0.4V
sky for better signal reception.
Protocols
NMEA, OSP
2. Connect it to main board via connector.
Environmental Data
Ordering Information
Operating temperature
-40 ~ 85 except
GM-420X
battery: -20~60
Storage temperature
-40 ~ 85except
battery: -40~60
Vibration
5Hz to 500Hz, 5g
*This document is subject to change without notice.
Shock
Half sine 30g/11ms
Mechanical Data (Patch antenna: 18x18x4)
NaviSys Technology Corp.
http://www.navisys.com.tw/
Tel : +886-3-5632598
Fax: +886-3-5632597
Sales contact: sales@navisys.com.tw
Technical support: service@navisys.com.tw
Address: 2F, No.56, Park Ave. II, Science-Based Industrial Park, Hsinchu 300, Taiwan (R.O.C.)
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